/**
 * Created by Administrator on 2022/8/22.
 */
public class Demo1 {
    public static void main(String[] args) {
        // 修饰变量或字段，表示常量(即不能修改)
        final int a = 10;
        //a = 20;
        System.out.println(a);
    }
}

/*class A {

}
class B extends A {

}
final class C extends B {

}
class D extends C {

}*/
